"You can no longer place account bound items (i.e. store hats) on barter stands." - Game Development: Mercury Bones, viewtopic.php?f=39&t=61430
According to this, tokens aren't account bound and it makes a lot of confusion that before this patch (probably) some people had their tokens put as payment method and now it is impossible. It doesn't make a lot of sense and just wanted to know if it is a bug or a result of un-told explanation or something else.